Shares fell 6.8 percent to $70.80 after hours as the company lowered its full-year revenue guidance and offered weak estimates for the second quarter. Through the close, the stock has fallen 20 percent since the start of the year.

About Voices

Along with original content and posts from across the Dow Jones network, this section of AllThingsD includes Must-Reads From Other Websites — pieces we’ve read, discussions we’ve followed, stuff we like. Six posts from external sites are included here each weekday, but we only run the headlines. We link to the original sites for the rest. These posts are explicitly labeled, so it’s clear that the content comes from other websites, and for clarity’s sake, all outside posts run against a pink background.

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